Question 1

How does the portion calculator estimate my energy needs?

Accepted Answer

With the IOM 2005 equations, from your age, sex, height, weight and activity. Next to that estimate the calculator shows the D-A-CH reference values for your age group at three activity levels and, for adults, your resting energy from the Müller (2004) equation. Resting energy times your PAL gives your needs by the D-A-CH method.

Question 2

What values is the calculator based on?

Accepted Answer

Two sources: the IOM 2005 equations for your estimate, and the joint D-A-CH reference values for energy intake (derived in 2015, still current) with the resting-energy formula the DGE uses for adults. The reference values and portions are shown as published.

Question 3

What is a PAL value?

Accepted Answer

PAL stands for “physical activity level” and describes how active a day is. Mostly seated work is about 1.4–1.5; walking and standing work 1.8–1.9. Regular sport can add roughly 0.3.

Question 4

Does the calculator use kilocalories or kilojoules?

Accepted Answer

Both. A switch on your result changes between kcal and kJ, and the reference values follow it. The DGE table itself is in kcal (1 kcal = 4.184 kJ).

Question 5

Does the calculator replace dietary advice?

Accepted Answer

No. The results are general guidance based on population reference values and do not replace individual advice from a doctor or dietitian — especially in pregnancy, breastfeeding or illness.

Portionsrechner — German Food Pyramid Portions & D-A-CH Energy